1a14d5393SJaegeuk Kimconfig F2FS_FS 2d7196c5aSJaegeuk Kim tristate "F2FS filesystem support" 3573ea5fcSJaegeuk Kim depends on BLOCK 4*43b6573bSKeith Mok select CRYPTO 5*43b6573bSKeith Mok select CRYPTO_CRC32 6a14d5393SJaegeuk Kim help 7a14d5393SJaegeuk Kim F2FS is based on Log-structured File System (LFS), which supports 8a14d5393SJaegeuk Kim versatile "flash-friendly" features. The design has been focused on 9a14d5393SJaegeuk Kim addressing the fundamental issues in LFS, which are snowball effect 10a14d5393SJaegeuk Kim of wandering tree and high cleaning overhead. 11a14d5393SJaegeuk Kim 12a14d5393SJaegeuk Kim Since flash-based storages show different characteristics according to 13a14d5393SJaegeuk Kim the internal geometry or flash memory management schemes aka FTL, F2FS 14a14d5393SJaegeuk Kim and tools support various parameters not only for configuring on-disk 15a14d5393SJaegeuk Kim layout, but also for selecting allocation and cleaning algorithms. 16a14d5393SJaegeuk Kim 17a14d5393SJaegeuk Kim If unsure, say N. 18a14d5393SJaegeuk Kim 19a14d5393SJaegeuk Kimconfig F2FS_STAT_FS 20a14d5393SJaegeuk Kim bool "F2FS Status Information" 21a14d5393SJaegeuk Kim depends on F2FS_FS && DEBUG_FS 22a14d5393SJaegeuk Kim default y 23a14d5393SJaegeuk Kim help 24a14d5393SJaegeuk Kim /sys/kernel/debug/f2fs/ contains information about all the partitions 25a14d5393SJaegeuk Kim mounted as f2fs. Each file shows the whole f2fs information. 26a14d5393SJaegeuk Kim 27a14d5393SJaegeuk Kim /sys/kernel/debug/f2fs/status includes: 28a14d5393SJaegeuk Kim - major filesystem information managed by f2fs currently 29a14d5393SJaegeuk Kim - average SIT information about whole segments 30a14d5393SJaegeuk Kim - current memory footprint consumed by f2fs. 31a14d5393SJaegeuk Kim 32a14d5393SJaegeuk Kimconfig F2FS_FS_XATTR 33a14d5393SJaegeuk Kim bool "F2FS extended attributes" 34a14d5393SJaegeuk Kim depends on F2FS_FS 35a14d5393SJaegeuk Kim default y 36a14d5393SJaegeuk Kim help 37a14d5393SJaegeuk Kim Extended attributes are name:value pairs associated with inodes by 38a14d5393SJaegeuk Kim the kernel or by users (see the attr(5) manual page, or visit 39a14d5393SJaegeuk Kim <http://acl.bestbits.at/> for details). 40a14d5393SJaegeuk Kim 41a14d5393SJaegeuk Kim If unsure, say N. 42a14d5393SJaegeuk Kim 43a14d5393SJaegeuk Kimconfig F2FS_FS_POSIX_ACL 44a14d5393SJaegeuk Kim bool "F2FS Access Control Lists" 45a14d5393SJaegeuk Kim depends on F2FS_FS_XATTR 46a14d5393SJaegeuk Kim select FS_POSIX_ACL 47a14d5393SJaegeuk Kim default y 48a14d5393SJaegeuk Kim help 49a14d5393SJaegeuk Kim Posix Access Control Lists (ACLs) support permissions for users and 50217940d4SJunesung Lee groups beyond the owner/group/world scheme. 51a14d5393SJaegeuk Kim 52a14d5393SJaegeuk Kim To learn more about Access Control Lists, visit the POSIX ACLs for 53a14d5393SJaegeuk Kim Linux website <http://acl.bestbits.at/>. 54a14d5393SJaegeuk Kim 55a14d5393SJaegeuk Kim If you don't know what Access Control Lists are, say N 568ae8f162SJaegeuk Kim 578ae8f162SJaegeuk Kimconfig F2FS_FS_SECURITY 588ae8f162SJaegeuk Kim bool "F2FS Security Labels" 598ae8f162SJaegeuk Kim depends on F2FS_FS_XATTR 608ae8f162SJaegeuk Kim help 618ae8f162SJaegeuk Kim Security labels provide an access control facility to support Linux 628ae8f162SJaegeuk Kim Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO 638ae8f162SJaegeuk Kim Linux. This option enables an extended attribute handler for file 648ae8f162SJaegeuk Kim security labels in the f2fs filesystem, so that it requires enabling 658ae8f162SJaegeuk Kim the extended attribute support in advance. 668ae8f162SJaegeuk Kim 678ae8f162SJaegeuk Kim If you are not using a security module, say N. 683b218e3aSJaegeuk Kim 693b218e3aSJaegeuk Kimconfig F2FS_CHECK_FS 703b218e3aSJaegeuk Kim bool "F2FS consistency checking feature" 713b218e3aSJaegeuk Kim depends on F2FS_FS 723b218e3aSJaegeuk Kim help 733b218e3aSJaegeuk Kim Enables BUG_ONs which check the filesystem consistency in runtime. 743b218e3aSJaegeuk Kim 753b218e3aSJaegeuk Kim If you want to improve the performance, say N. 7663f92ddcSJaegeuk Kim 77d33793fbSJaegeuk Kimconfig F2FS_FS_ENCRYPTION 78d33793fbSJaegeuk Kim bool "F2FS Encryption" 79d33793fbSJaegeuk Kim depends on F2FS_FS 80d33793fbSJaegeuk Kim depends on F2FS_FS_XATTR 810b81d077SJaegeuk Kim select FS_ENCRYPTION 82d33793fbSJaegeuk Kim help 83d33793fbSJaegeuk Kim Enable encryption of f2fs files and directories. This 84d33793fbSJaegeuk Kim feature is similar to ecryptfs, but it is more memory 85d33793fbSJaegeuk Kim efficient since it avoids caching the encrypted and 86d33793fbSJaegeuk Kim decrypted pages in the page cache. 87d33793fbSJaegeuk Kim 8863f92ddcSJaegeuk Kimconfig F2FS_IO_TRACE 8963f92ddcSJaegeuk Kim bool "F2FS IO tracer" 9063f92ddcSJaegeuk Kim depends on F2FS_FS 9163f92ddcSJaegeuk Kim depends on FUNCTION_TRACER 9263f92ddcSJaegeuk Kim help 9363f92ddcSJaegeuk Kim F2FS IO trace is based on a function trace, which gathers process 9463f92ddcSJaegeuk Kim information and block IO patterns in the filesystem level. 9563f92ddcSJaegeuk Kim 9663f92ddcSJaegeuk Kim If unsure, say N. 97